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The green stems grow 50–150 cm tall and 2–8 mm thick. The leaf sheaths are narrow, with 15-20 black-tipped teeth. [2] Many, but not all, stems also have whorls of short ascending and spreading branches 1–5 cm long, with the longest branches on the lower middle of the stem.
Equisetum hyemale (rough horsetail [2]) is an evergreen perennial herbaceous pteridophyte in the horsetail family Equisetaceae native to Eurasia and Greenland. It was formerly widely treated in a broader sense including a subspecies (subsp. affine ) in North America, but this is now treated as a separate species, Equisetum praealtum .
Equisetum arvense, the field horsetail or common horsetail, is an herbaceous perennial plant in the Equisetidae (horsetails) sub-class, native throughout the arctic and temperate regions of the Northern Hemisphere. It has separate sterile non-reproductive and fertile spore-bearing stems growing from a perennial underground rhizomatous stem
It is an evergreen herbaceous perennial plant, with green stems, each stem usually topped by a spore-bearing strobilus.The stems, produced in late spring and dying down a year and a half or two years later, are 18–150 cm (7.1–59.1 in) (occasionally to 220 cm (87 in)) tall and 6–18 mm (0.24–0.71 in) diameter, usually unbranched; they are ridged, with 14–50 ridges, and bear whorls of ...
The plants have intercalary meristems in each segment of the stem and rhizome that grow as the plant gets taller. This contrasts with most seed plants, which grow from an apical meristem - i.e. new growth comes only from growing tips (and widening of stems). Horsetails bear cones (technically strobili, sing. strobilus) at the tips of some stems.
Equisetaceae, also known as the horsetail family, [1] is a family of ferns and the only surviving family of the order Equisetales, with one surviving genus, Equisetum, comprising about twenty species.
The stems are the stoutest of any horsetail, 1–2 cm diameter (up to 3.5 cm (1.33 inches) in diameter in some populations), [5] and bear numerous whorls of very slender branches; these branches are not further branched, but some terminate in spore cones. Unlike some other horsetails, it does not have separate photosynthetic sterile and non ...
Equisetum telmateia, the great horsetail, is a species of Equisetum (horsetail) native to Europe, western Asia and northwest Africa. [ 2 ] [ 3 ] It was formerly widely treated in a broader sense including a subspecies (subsp. braunii ) in western North America, but this is now treated as a separate species, Equisetum braunii .
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